ALEXANDER, JEROME (1876— ), American chemist, was born in New York city, on Dec. 21, 1876. He graduated in 1896 from the College of the City of New York from which in 1899 he received the degree of master of science. He was an offi cial and chief chemist for various companies from 1896 until 1921, when he began individual practice as consulting chemist and engi neer. In connection with this work he specialized in the chemistry of colloids and was an early investigator in America with the ultra microscope. He published Colloid Chemistry (1919) and, in col laboration with numerous scientists, Colloid Chemistry, Theoreti cal and Applied (1926). In 1909 he translated Richard Zsig mondy's Colloids and the Ultramicroscope. His writings include also the sections "Glue and Gelatin" and "Colloid Chemistry" in Roger's Industrial Chemistry (1912), the article "Albuminoids or Scleroproteins" in Allen's Commercial Organic Analysis (1913), and the chapter "Colloid Chemistry" in Liddell's Handbook for Chemical Engineers (1920).